Liquid-heater.



PATENTED PEEL 14, 1905.

WALDBAUR. LIQUID HEATER.

APPLIUATIOH IILBDAUG. 10, 1901.

zen of the German Empire, residing atStutt enable others skilled in theart to w or chamber and means for .vention; Fig.

UNtT D STATES Acct? WALDBAUR, on

Patented February 14, 1905v STUTTGART, enRMANY.

' LIQUID-HEATER;

SPEGIFICATION forming partpf Lette .Zpplieatiun filed August 10, 1901.seat! in. 71,526.

rs Patent No. 782,632, dated February 14, 1905.

f/o all Ill/1107M it may concern:

Be it known that I, ADOLF WALD AUR,a citigart, Kingdom of WViirtemberg,(iermany; have invented certainnew and useful Improvements inLiquid-Heaters; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will hich itappertainsto make and use the same.

The present invention relates'to heating apparatus for-liquids, andespecially devices for. heating water, the object of the same being to.provide a simple and cheap heatingdevice for this purpose which willoccupy a very small space and in which the caloric of the heatingmedium' will be given off to the water or other liquid in the completestmannerpossible.

With these objects in view an apparatus-embodying my invention combineswith a heating pipe or chamber one or more Sources of flame, such asBunsen burners, which are in direct communication .with said heatingpipe injecting into the same water in a spray or tine jets in such a wayas to create sufficient suction or draft to draw the flames into thebody of the water or" other liquid to be heated, and thereby intointimatc contact with the same. By this means a strong air-draft iscreated, whereby the coin bustion of the Bunsen burners takes place inso complete and thorough a manner as to eliminate all odor of the gas,and, moreover, the products of combustion and the liquid are socompletely mixed that the heating efl'ectol' the former is fullytransmitted to the latter.

Other features of my inai'tcr described, out in the claims: l will nowdescribe my invention in detail with reference to the accompanying drawings, in whicl Figure 1 represents a water-heating apparatus andparticularly pointed side elevation of a embodying my in-, 2, a verticallongitudinal cen 'tral section of the same on an enlarged scale; Fig. 3,a transverse section on line :1: 11:, Fig. 2; Fig. 4:, a-.top plan viewof the same; Fig. 5, a vertical-section on line A A, Fig. of a Jsomewhat-modified form of apparatus eml in vention will be herogas-bui-ne Referring first to Figs. 1 to 4, it will be observed that theheating apparatus represented therein in embodiment of my invention con-.sists of a liquid-heating pipe 1!, having acouical or flaringenlargement l1, constituting an approach thereto, to which is joined awaterpipe it, provided with any suitable cock orregulating device vi.lntothis conical enlargement ('1 is fitted in any suitable way--forexample, by aserew-joinaas shown --a similarly conical fiue c, theenlargement b and deflector a being so shaped and arranged that only avery thin annular space for the passage of the water to the heating-pipert is left. A Bunsen gas-buruer consisting of one or a number ofgas-jets (1 extends into the rear end of the flue 0, these burners inthe present instance being secured to and deriving their gas-supply froma common gas-chamber e, which gaschamber in turncommunicates with thegaspipef, controlled by any usual or convenient gas cook or valve g. Theforward end of the pipe 11. may be connected at 1/," with a furthercold-watcr pi pc 11., having a cock 1, whereby the heated water maybemixedand tempered with cold water according to need or desire. As shown,thc gas-chamber 1' is removably conlHN'llGti to the ei'ilargeinentoby means of a metal sleeve k, having a number of air-openings A" forfurnishing the air-supply to the Bunsen-burner lach individual jetr/ ofthe r is, as shown, made in the usual form of a Bunsen burner, havingthe usual air- (awnings 1t.

For convenience of illustration the heating apparatus is shown in ahorizontal ;.::sition in the various ligurcs of the drawings,.ln tin thepractical appliczution ot' the device it is usually arrangedverticallyinstead ot' horizontally, the water and products of combustionbeing introduced downwardly.

In operation, the gas burner being lighted in the usual manner and thecocky: being operated to the desired extent, the water pro ceeds to flowthrough the narrow annular too of the rrow, thereby creating a draft orsuction inthe,manner well known in in ectors. Thereby the air ofcombustion is drawn heater.- pipe at in an annular spray by the annularsprayer 6, while the heating-flame. are injected into the same at itsopen rear en a from a battery of Bunsen burners (Z, which with suchforce and speed through the airmay be swung into and out of position foropenings 7: and d as to create a flame or flames of great intensity andheat, which flames and lighting and "for other purposes mounted on aswiveled gas-supply pipef, a

the heated products of combustion therefrom shown.

are forcibly injected, in the direction of the arrow 2, into thewater'as it passes through the heating-pipe (0, thereby quickly heatingthe same and giving off practically all of their heat to the water.Since under these conditions the combustionis complete, no gas odor ortaste is impartedzto the water, the carbon dioxid generated incombustion beingpracoperation water may be heated for drinking, cooking,bathing, and other purposes in an exceedingly short time and, as notedfrom the above, the means for effecting the result are of ple naturethat an exceedingly pensive and, if desired, portable apparatus may bemade under iny invention for heating water for various purposes. Theamount of water to be heated in a certain time and the temperature to beimparted to the same may be nicely regulated by properly turning the vgas-cock 1 or the water-cock v", or both.

is in further regulating means for this purpose embodied in thewater-cock 0., arranged the subsidiary water-pipe w.

In Figs. 5 and 6 I have representeda moditied form of water-heater undermy invention which differs from that just described inthe followingparticulars: The water-heater. is under this construction provided withone or more flues c'- in the present instance two-- communicating withits interior at its rear end at 0. Below the fiucs a are arranged Bunsengas-burners r], as in the first example, suflicient space being leftbetween the burners and the lower openings of the fines to ad will beunderstood;

mit a sufficient draftof air for rapid combustion, the flues beingpreferably flaring at their bottom, so as to intensify the draft, as 1The burners are fed from the gas-pipe a, controlled by the gas-cock g,as in the first example. The water is in the present case injected intothe heater-pipe (I in the form of a spray behind the flame-inletsthrough the spray nozzle or rose 1). At its forward end the heating-pipe(1- may be provided with a flue 7), through which the heated waterpassesdownward, as indicated by arrow 3. The direction of the flow ofwater and of the flames and products of combustion are hereagain'indicated by the arrows 1 and 2, respectively. In this example, itwill be noted, he flames pass in advance of the water: -1nlet, while"the reverse arrangement discl:'.-sed.in the first example."

such very sim-- light and mex- From all of the above exemplifications ofthe manner in whichmy invention may be carried into eflectit will beseen that one part of said invention consists, essentially, in aliquid-heating pipe or chamber in combinationwitha source of flamedirectly communicat ing therewith, so that the flames or products ofcombustion will directly enter the liquid to be. heated.

Another important feature is the fact that& strong draft or suctioniscreated which can by being ries a current of air through and around theflame-generators, whereby an intense heat and a perfect combustion areproduced, the degree" of heat supplied by the burners being directly andautomatically regulated by the supply of the liquid to be heated.

Still another importantdistinguishing ture of my invention lies in thefact that the water-injector in the shape of a spraying or contractednozzle for feeding the water to be heated to the heatin g pipe orreceptacle serves to create said strong draft or suction throu'gh' theair-supply for the burners, whereby, as stated, an intense and perfectcombustion is attained.

What I claim, and desir'e'to secure by Letters Patent of the UnitedStates, is-

1. In a liquid-heater, the combination, with a heating-receptacle opento the atmosphere,

of a burner arranged to throw its heat into for introducing the underpressure and means said receptacle, means liquid into the vessel wherebythe flow of the liquid controls the draft of the burner. 2.Inaliquid-heater, the combination, with a heating-receptacle open to theatmosphere w ith jector action of the liquid will supply air to theburner inquantities varying with the flow of the'liquidi 4, In aliquid-heater, the combination, with a burner and air-inlets, and apassagearranged about saidburner, of means and heated into atmospherewith the burner, whereby the in- .1 3c; of a Bunsen burner arranged tothrow its heat;

for discharging the liquid to be heated into the receptacle through saidpassage, whereby the draft'upon the burner is automatically regulated bythe supply of the liquid to be heated.

- 5. inaliquid-heater, the cOmbinationAigith a heating-pipe open to theatmosphere. an

annular inlet, and means for forcing the liquid to be heated into saidpipe through the inlet,"

of a burner arranged to throw its flames into the heating-pipe centrallyof the liquid-inlet, and air-inlets communicating from the outer airwiththe burner, whereby the moving liquid will supply air to the burnerin quantities varying with the flow of the'liquid.

6. Inaliquid-heater, the combination, with a heating-receptacle open tothe atmosphere,

- an approach to said receptacle, a pipe disposed within the approach insuch manner as to leave an annular space between the pipe and the ap- Iproach, and means. for discharging the liquid to be heated into thereceptacle by way of-the annular space, of a burner disposed within thepipe in such relation as to project the heated products of combustiontherethrough, and an air-inlet, whereby the flow of the liquid will byan injector action create adra-ft acting upon the air from the inlet tothe products of combustion from the burner.

T. In a liquid-heater, the combination, with a heating-receptacle, aconical approac i to said receptacle, a pipe disposed within but out ofcontact with the conical approach, and means for discharging the liquidto be heated under pressure into the annular space between the pipe andthoapproach, of a burner disposed within the pipe in such relation as toprojectits incandescent gases therethrough, and an airinlet to theburner whereb the flow of the; liquid from the annular space into the'heatingreceptacle will by an injector action create a draft acting uponthe air from the inlet and the productsof combustion from the burner.

8. In a liquid-heater, the combination, with aheating-receptacle opentothe atmosphere, a conical approach to said receptacle, a pipe disposedwithin, but out of contact with the conical approach, and means fordischarging the liquid to be heated under pressure into th annular spacebetween'the pipe and the approach, of a burner disposed within the pipein such relation to project its incandescent gases therethrough, and anair-inlet to the burner whereby the flow of the liquid from the annularspace into. the'heating-receptacle will by an injector action create adraft acting upon the air from the inlet and the products of combustionfrom the burner, said draft being substantially proportionate to thesupply of the liquid to be heated.

9: In a liquid-heater, the combination, with a heating-receptacle, aconical approach to said receptacle, a conical pipe disposed within butout of contact with the conical approach, and means for discharging theliquid to be heated into the annular space between the pipe and theapproach, of a fuel-burner disposed within the conical pipe in suchrelation as toproject its incandescent gases therethrough, and anair-inlet to the burner, whereb,v the ,iiow of-

